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8. The PayPal Web Services API > 88. Make Your First API Call

Make Your First API Call

Make your first API call by issuing a refund from the command line.

As a programmer, you know that web services are the “next big thing.” They’re supposed to make it easy for two computers to exchange information. PayPal Web Services, however, handle money and therefore require an extra level of security. The extra layers are quite easy to implement, but you’ll need to take the following configuration steps prior to executing your first call:

  1. Set up an SSL certificate issued by PayPal.

  2. Install Simple Object Access Protocol (SOAP) libraries or set up a web reference to SOAP-enable your application

Setting Up the SSL Certificate

Your web site might already have an SSL certificate that it uses for secure communication, but at the time of this writing, PayPal does not support using certificates from other certificate authorities (CAs). This means that you’ll need to generate an SSL certificate from the PayPal Sandbox [Hack #87] , and then later, the PayPal live site when your application goes live [Hack #100] . Here’s how to request an API certificate:


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